Blue Diamond Receives US Patent on "3N1 HDPE Multi-Cell Conduit"

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3N1 is a Complete Package of Casing and Innerduct for Boring Applications

On November 14th, the US Patent office awarded Blue Diamond with Patent No. 9,819,160 on the “Continuous Conduit with Pre-Installed Innerducts”, a “Boreable” HDPE continuous conduit with 3 or 4 innerducts pre-installed inside.  The 4” outer casing is extruded over the innerducts at Blue Diamond’s manufacturing facility in Middlesboro, KY.  

Blue Diamond 3N1 saves time and money by allowing contractors to bore a complete package.  Innerducts do not have to be pulled through after the bore, allowing you to blow fiber or pull power lines as soon as the bore is complete, without special equipment.  3N1 can also be trenched or plowed in applications along highways.

Currently, 3N1 is available in a 4” SIDR 11.5 casing with 3-1 1/4” SDR 13.5 innerducts installed.  (4-1” innerducts can also be installed “4N1”).  Lengths of 500-1000’ are standard, however, custom lengths and configurations are available.  

Blue Diamond Industries ( is a premier manufacturer of high density polyethylene (HDPE) pipe, headquartered in Lexington, Kentucky.  Blue Diamond is UL and RUS listed and manufactures HDPE conduit for communication, power, wind and solar energy, highway and street lighting, FTTH (Fiber to the Home), ITS (Intelligent Transportation Systems), CATV, and Industrial Pressure pipe applications.  

For more information, call our corporate office at 859-224-0415 or email our techincal director George Zagorski.

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